diff --git a/src/init/lib/PhutilMissingSymbolException.php b/src/init/lib/PhutilMissingSymbolException.php
--- a/src/init/lib/PhutilMissingSymbolException.php
+++ b/src/init/lib/PhutilMissingSymbolException.php
@@ -18,7 +18,8 @@
       'moved, your library map may need to be rebuilt. You can rebuild '.
       'the map by running "arc liberate".'.
       "\n\n".
-      'For more information, see: https://phurl.io/u/newclasses',
+      'For more information, see: '.
+      'https://we.phorge.it/book/contrib/article/adding_new_classes/',
       $symbol,
       $type,
       $reason);
diff --git a/src/runtime/ArcanistRuntime.php b/src/runtime/ArcanistRuntime.php
--- a/src/runtime/ArcanistRuntime.php
+++ b/src/runtime/ArcanistRuntime.php
@@ -188,7 +188,7 @@
         tsprintf(
           '%s <__%s__>',
           pht('Learn More:'),
-          'https://phurl.io/u/noninteractive'));
+          'https://secure.phabricator.com/T13491'));
 
       throw new PhutilArgumentUsageException(
         pht('Missing required "--" in argument list.'));